{
 "format": "wai-catalogue-prior/1",
 "about": "The run behind research/catalogue-prior.md: its corpus, tools, timeline, decision rule and verdicts, and the SHA-256 of each reading file beside this one, as the run wrote it.",
 "readings": {
  "a_basis.json": "5186b5b77adfc9aabd685b3e4a3d1fa34fa82c345093b6b28c9a0c1c2467ca68",
  "b_recur.json": "10247e1f4bfdd8b847e362daa870d80b7f3b83e12cd896f924c8215e267bc9e2",
  "c_rd.json": "c81b95872c384a1f8c70acc1b95fd11dae6488388d0d605b9ebb74a5af2a83d0",
  "d_exact.json": "74444442b5150dff0412834861170cfeec7a71bc8ac728d14671fb640df3520d"
 },
 "corpus": [
  {
   "code": "ED",
   "title": "Elephants Dream",
   "year": 2006,
   "file": "elephantsdream-720-h264-st-aac.mov",
   "bytes": 152496338,
   "sha256": "6fc295e0e92835316ec95929ccfc664b05ed2434f673e6f5e684f98f7558a547",
   "raster": "720x405",
   "frames": 15693,
   "licence": "Creative Commons; the version is not stated on the page fetched",
   "licence_page_sha256": "96a8277544d978deb79503c2b82667501429d6c1cbeeabb9adba5eaa5cb01e36",
   "licence_fetched": "2026-11-04T01:38:17Z"
  },
  {
   "code": "BBB",
   "title": "Big Buck Bunny",
   "year": 2008,
   "file": "big_buck_bunny_720p_h264.mov, read from the archive whose SHA-256 is given",
   "bytes": 416751396,
   "sha256": "b0c9ade80b086179feee41514929de583966eec87c703575d97f051f88b33b67",
   "raster": "1280x720",
   "frames": 14315,
   "licence": "Creative Commons Attribution 3.0",
   "licence_page_sha256": "bd9eb73ddec647bbb486c47316163042a9655a8483358c093121341d0dc080cf",
   "licence_fetched": "2026-11-04T01:38:17Z"
  },
  {
   "code": "SIN",
   "title": "Sintel",
   "year": 2010,
   "file": "the 1080p release",
   "bytes": 1172428172,
   "sha256": "fae11ed41b2c99dfbeabce7ea5458446e21e7b840a982f510f2341919c3d9920",
   "raster": "1920x818",
   "frames": 21312,
   "licence": "Creative Commons Attribution 3.0",
   "licence_page_sha256": "67f30f30c55022c6f7de66beb997f04117b24f7aca928a912286a53edaa4b627",
   "licence_fetched": "2026-11-03T12:26:59Z"
  },
  {
   "code": "TOS",
   "title": "Tears of Steel",
   "year": 2012,
   "file": "the 1080p release",
   "bytes": 583774083,
   "sha256": "99486359be7e3681168a0fe94e1cbb0284c48b57b2a3ce7df4fa75e185987a15",
   "raster": "1920x800",
   "frames": 17620,
   "licence": "Creative Commons Attribution 3.0",
   "licence_page_sha256": "c3defc0521e16af0a3afb6a96d084517620adf6434038e6a3a2ba1cf50f86947",
   "licence_fetched": "2026-11-03T12:26:44Z"
  }
 ],
 "analysis_raster": "luma at 640x360, area scaling, 8-bit limited range as decoded; 128x72 by 5x5 area mean (float) and 64x36 by 10x10 area mean (rounded to 8 bits) derived from it",
 "tools": {
  "ffmpeg": "9.0.2",
  "svt_av1": "4.2.0",
  "dav1d": "1.5.4",
  "libvmaf": "3.2.1, model vmaf_v0.6.1",
  "python": "3.14.4",
  "numpy": "2.3.5"
 },
 "host": "a shared Linux x86_64 build host, 32 threads; each step in a user scope with MemoryMax=64G, CPUWeight=50 and nice 10; BLAS capped at 8 threads",
 "timeline": [
  {"utc": "2026-11-04T01:38:17Z", "event": "licence pages fetched"},
  {"utc": "2026-11-04T01:43:38Z", "event": "the rate proxy's target PSNRs (30, 35, 40 and 45 dB) recorded with the basis script in a snapshot of the measurement scripts"},
  {"utc": "2026-11-04T01:49:04Z", "event": "moment accumulation finished: the last moments file written; no figure printed"},
  {"utc": "2026-11-04T01:58Z", "event": "the decision rule written, before any result of measurements (a) or (c) was seen; attested, not committed before the results"},
  {"utc": "2026-11-04T01:58:51Z", "event": "the residual-coding script last changed"},
  {"utc": "2026-11-04T02:00:43Z", "event": "the first result file written: a_basis.json"},
  {"utc": "2026-11-04T02:01:24Z", "event": "the basis script's only later change: a print format"},
  {"utc": "2026-11-04T02:38:59Z", "event": "c_rd.json written"}
 ],
 "rule": {
  "go": {"bd_rate_max": -10, "metrics": ["psnr", "vmaf"], "titles_min": 3, "breakeven_titles_per_sink_max": 5},
  "k1": {"below_dct_pct": 5, "targets": [35, 40], "of": "the catalogue basis's rate proxy on the median title, at every granularity"},
  "k2": {"bd_rate_above": 0, "metrics": ["psnr", "vmaf"], "of": "the catalogue-basis residual and its coefficients against AV1 through the same pipeline, on the median title"},
  "k3": {"runtime_pct_below": 1, "thumb_psnr_min": 40, "full_psnr_min": 35, "of": "non-flat material recurring across titles, per title"}
 },
 "verdicts": {"go": false, "k1": true, "k2": true, "k3": true, "no_psnr_saving_any_title": true}
}